"Pro Tools Hardware is either not installed or in use by another program...

"Pro Tools Hardware is either not installed or in use by another program" while Launching Pro Tools with a Digi 001, d24, or Mix system.

1. Disable the "Digidesign Output Drivers." In some cases disabling/restarting and then re-enabling/restarting the "Digidesign Output Drivers" fixed it.2. With TDM users, running the "Plug-in Updater" again from the CD-ROM installer also fixed it.

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